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Finding the Fourth Proportional to 123,555.70, 185,333.55 and 81,492.40

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Solution

The fourth proportional to 123,555.70, 185,333.55 and 81,492.40 is: 122,238.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,555.70 : 185,333.55 = 81,492.40 : x
  2. Step 2: Convert to fraction form
    123,555.70/185,333.55 = 81,492.40/x
  3. Step 3: Cross multiply
    123,555.70x = 185,333.55 × 81,492.40
  4. Step 4: Simplify right side
    123,555.70x = 15,103,275,790.02
  5. Step 5: Solve for x
    x = 15,103,275,790.02/123,555.70
  6. Step 6: Final answer
    x = 122,238.60

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.